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Finding the Fourth Proportional to 649.62, 895.97 and 387.58

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Solution

The fourth proportional to 649.62, 895.97 and 387.58 is: 534.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    649.62 : 895.97 = 387.58 : x
  2. Step 2: Convert to fraction form
    649.62/895.97 = 387.58/x
  3. Step 3: Cross multiply
    649.62x = 895.97 × 387.58
  4. Step 4: Simplify right side
    649.62x = 347,260.05
  5. Step 5: Solve for x
    x = 347,260.05/649.62
  6. Step 6: Final answer
    x = 534.56

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.